OS
What does it do
Establish a user interface
Execute and provide services for applications software
manage the computer's resources, such as the central processing unit, memory, disk drives, and printers
GUI
Drag and drop features
Uses a lot of Memory and RAM
They are much easier to use for beginners.
Allow the user to try out different options easily
CLI
Allows the user to interact with the computer by typing in commands
Features
Commands must be typed in correctly and in the right order
Do not need to run in Windows
Multi-user
Multiple users can use the machiene
Each person has their own area where the information is stored
Files can not be accessed by other users unless it is part of a shared folder
Multi Tasking
The computer does not need to be restarted to swap users
Main Features
Pointer
Icons
Menues
Desktop
Windows
The ability to run several applications simultaneously
E.g. Running Email at the same time as watching YouTube
Security
Prevent wrong user from gaining access to another user’s private files.
By dividing memory into sections and keeping a log of which users use each program
Some files are stored centrally and all users can access and edit these files
Utility programs - small programs which perform a limited function to help the computer system run smoothly and securely
System Maintenance
Computer security
Spyware protection
Antivirus
File and Setting Transfer Wizard
System information and diagnostics
Detects and destroys viruses which could damage or corrupt the computer system
Stops people from being able to illegally monitor other peoples’ use of their computer
Firewall
Limit damage from an external or internal cyber attack
Disk Organisation
Disk Formatting
It deletes any data which is already on the device
File Transfer
A software that assists in moving files from one computer system to another